Corrosion Characteristics of Copper-Added Austempered Gray Cast Iron (AGCI)
Abstract
:1. Introduction
2. Materials and Methods
2.1. Sample Preparation
2.2. Heat Treatment of Samples
2.3. Metallography and X-ray Diffraction (XRD)
2.4. Electrochemical (Corrosion) Test
3. Results and Discussion
3.1. Microstructure and XRD Analysis
3.2. Electrochemical Behavior of As-Cast Gray Iron and AGCI in Different Solutions
3.3. Effect of Austenite Content on Corrosion Behavior
3.4. Microstructure after Corrosion
3.4.1. Optical Images after Corrosion in 3.5% NaCl Solution
3.4.2. Optical Images after Corrosion in 0.5 M H2SO4 Solution
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Element | C | Si | Mn | P | S | Cu | Fe |
---|---|---|---|---|---|---|---|
Composition | 3.46 | 2.27 | 0.53 | 0.019 | 0.01 | 0.50 | Bal. |
Sample Condition | Icorr (μA/cm2) | Ecorr (V) |
---|---|---|
Austempering Temperature (°C) | - | - |
As-cast gray iron | 70 | –0.80 |
927 °C–260 °C | 62 | –0.75 |
927 °C–285 °C | 54 | –0.70 |
927 °C–310 °C | 42 | –0.62 |
927 °C–335 °C | 30 | –0.50 |
927 °C–360 °C | 16 | –0.45 |
927 °C–385 °C | 7 | –0.40 |
Sample Condition | Icorr (µA/cm2) | Ecorr (V) |
---|---|---|
Austempering Temperature (°C) | - | - |
As-cast gray iron | 150 | –0.60 |
927 °C–260 °C | 130 | –0.55 |
927 °C–285 °C | 110 | –0.50 |
927 °C–310 °C | 98 | –0.48 |
927 °C–335 °C | 90 | –0.42 |
927 °C–360 °C | 82 | –0.38 |
927 °C–385 °C | 65 | –0.36 |
Sample Condition | Rp (ohm.cm2) |
---|---|
Austempering Temperature (°C) | - |
As-cast gray iron | 930 (± 46) |
927 °C–260 °C | 1850 (± 91) |
927 °C–310 °C | 2550 (± 102) |
927 °C–335 °C | 15,000 (± 450) |
927 °C–360 °C | 20,000 (± 1100) |
927 °C–385 °C | 80,000 (± 1600) |
Sample Condition | Rp (ohm.cm2) |
---|---|
Austempering Temperature (°C) | - |
As-cast gray iron | 20 (± 1) |
927 °C–260 °C | 28 (± 1) |
927 °C–285 °C | 32 (± 2) |
927 °C–310 °C | 62 (± 2) |
927 °C–335 °C | 450 (± 13) |
927 °C–360 °C | 700 (± 28) |
927 °C–385 °C | 2000 (± 85) |
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Seikh, A.H.; Sarkar, A.; Singh, J.K.; Mohammed, S.M.A.K.; Alharthi, N.; Ghosh, M. Corrosion Characteristics of Copper-Added Austempered Gray Cast Iron (AGCI). Materials 2019, 12, 503. https://doi.org/10.3390/ma12030503
Seikh AH, Sarkar A, Singh JK, Mohammed SMAK, Alharthi N, Ghosh M. Corrosion Characteristics of Copper-Added Austempered Gray Cast Iron (AGCI). Materials. 2019; 12(3):503. https://doi.org/10.3390/ma12030503
Chicago/Turabian StyleSeikh, Asiful H., Amit Sarkar, Jitendra Kumar Singh, Sohail M. A. Khan Mohammed, Nabeel Alharthi, and Manojit Ghosh. 2019. "Corrosion Characteristics of Copper-Added Austempered Gray Cast Iron (AGCI)" Materials 12, no. 3: 503. https://doi.org/10.3390/ma12030503
APA StyleSeikh, A. H., Sarkar, A., Singh, J. K., Mohammed, S. M. A. K., Alharthi, N., & Ghosh, M. (2019). Corrosion Characteristics of Copper-Added Austempered Gray Cast Iron (AGCI). Materials, 12(3), 503. https://doi.org/10.3390/ma12030503